@[Dry_ice](/user/214696)
这里：
```cpp
#define Y(j) f[j] + (s[j] + L) * (s[j] + L)
```
你试试这样？
```
#define Y(j) (f[j] + (s[j] + L) * (s[j] + L))
```
by Eason_AC @ 2021-09-12 22:05:46
@[Eason_AC](/user/112917) 谢谢辣，可以了
by Dry_ice @ 2021-09-12 22:06:34
https://www.luogu.com.cn/problem/CF7E
by impuk @ 2021-09-12 22:08:46
重题
by impuk @ 2021-09-12 22:08:55